Development of alginate gel nanosphere-based fluorescent fiber optic sensor and its application in chloride ion monitoring of cement paste

IF 13.1 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Cement & concrete composites Pub Date : 2025-09-02 DOI:10.1016/j.cemconcomp.2025.106318

Liang Fan , Zhenting Ma , Nazhen Liu , Yunfang Wan , Jing Xiang , Maomi Zhao

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引用次数: 0

Abstract

Fluorescent optical fiber sensors offer a promising non-destructive approach for chloride ion monitoring in reinforced concrete structures, though challenges such as dye leakage and reducing reusability hinder their practical application despite advantages in sensitivity and electromagnetic interference immunity. To address these issues, this study developed a fluorescent fiber optic sensor for non-destructive detection of chloride ion concentration in cement-based materials. By synthesizing fluorescent nanospheres of calcium carbonate-encapsulated Rhodamine 6G through nano-encapsulation technology, dye leaching was effectively prevented, and a chloride ion-sensitive membrane was fabricated and integrated into the fiber optic probe. The constructed sensing system exhibits excellent performance: a measurement error of <3 %, reusability of 9–10 times, and a rapid response time of only 6 s. Practical monitoring demonstrated that the sensor can track chloride ion penetration behavior in cement paste in real-time within the range of 0.001–0.3 M. This technology provides a novel method for durability monitoring of concrete structures, offering significant engineering application value.

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藻酸盐凝胶纳米球荧光光纤传感器的研制及其在水泥浆体氯离子监测中的应用

荧光光纤传感器为钢筋混凝土结构中的氯离子监测提供了一种很有前途的非破坏性方法，尽管在灵敏度和抗电磁干扰方面具有优势，但诸如染料泄漏和降低可重复使用性等挑战阻碍了它们的实际应用。为了解决这些问题，本研究开发了一种荧光光纤传感器，用于水泥基材料中氯离子浓度的无损检测。通过纳米包封技术合成碳酸钙包封罗丹明6G荧光纳米球，有效地防止了染料浸出，制备了氯离子敏感膜并集成到光纤探头中。所构建的传感系统具有优异的性能：测量误差为3%，可重复使用9-10次，快速响应时间仅为6秒。实际监测表明，该传感器可在0.001 ~ 0.3 m范围内实时跟踪氯离子在水泥浆体中的渗透行为，为混凝土结构耐久性监测提供了一种新方法，具有重要的工程应用价值。

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来源期刊

Cement & concrete composites 工程技术-材料科学：复合

CiteScore

18.70

自引率

11.40%

发文量

459

审稿时长

65 days

期刊介绍： Cement & concrete composites focuses on advancements in cement-concrete composite technology and the production, use, and performance of cement-based construction materials. It covers a wide range of materials, including fiber-reinforced composites, polymer composites, ferrocement, and those incorporating special aggregates or waste materials. Major themes include microstructure, material properties, testing, durability, mechanics, modeling, design, fabrication, and practical applications. The journal welcomes papers on structural behavior, field studies, repair and maintenance, serviceability, and sustainability. It aims to enhance understanding, provide a platform for unconventional materials, promote low-cost energy-saving materials, and bridge the gap between materials science, engineering, and construction. Special issues on emerging topics are also published to encourage collaboration between materials scientists, engineers, designers, and fabricators.